Locking means for telescoping elements



June 23, 1925. 1,542,841

J. SCHADE LOCKING MEANS FOR TELESCO PING ELEMENTS Filed Sept. 22- 1923 2 Sheets-Sheet 1 J. SCHADE LOCKING MEANS FOR I-ELESCOPING ELEMENTS June 23 Filed Sent. 1925 2 Sheel's-Shee't 2 3 1 M few? I IIIIIIIIII/IIII.

J/furmy Patented June 23, 1925.

UNITED STATES PATENT OFFICE.

JOHN SCHADE, or HOLYOKE, MAss oHUsErrs, Assrenonro N TIONAL BLANK Boon COMPANY, OF HOLYOKE, MASSACHUSETTS, A VOLUNTARY TRUST ASSOCIATION OF COPABTNER-SHIP, HAVING AS TRUSTEES F. BhTOWN'E, E. S. TOWNE, J'. M.

TOV] NE, AND F. 9V. VIILSO N.

LOCKING MEANS non TELEsooPINe ELEMENTS.

Application filed September 22, 1923. Serial No. 664,278.

To all when-t it may concern:

Be it known thatl, JOHN SoHAnn, a citi zen of the United States, residing at the city of Holyoke, in the county of Hampden and State of Massachusetts, have invented certain new and useful Improvements in Looking Means for Telescoping Elements; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the Figure 3 is likewise a section at the line 22 of Figure 1, but showing the telescop-- ing elements closed and unlocked- Figure a. is a detail perspective of the lock bar. I

Figure 5 is a. view similar to Figure 2, but showing the lock bar removed Figure 6 is a view similar to Figure 3 but showing more particularly a modified form of lock bar- Figure 7 is a section at the Figure 1' Figure 8 is a view similar to Figure'l, but looking in an opposite direction with the outer telescoping element partly broken away and sectioned, and showing a. further modification of the invention, in which the locking dog is pivoted to said outer element and is adapted to lock against the inner telescoping element- Figure 9 is a section at the line 9-9 of Figure 8, and

Figure of Figure 8.

Similar numerals of reference denote like parts in the several figures of the drawing.

While the invention is applicable to flat line 7 7 of 10 is a section at the line 1010 telescoping parts such as are used in vari ous arts, the invention will be clearly under stood whenillust-rated in connectionwith loose leaf binders, and therefore such an illustration is particularly shown in the drawings.

The parts of the loose leaf binder will be briefly referred to, without any detailed description since such parts are well-known.

1, 2,7 are the usual, cheek pieces of the binder carrying respectively the comples mental hinge elements 3, t, and to these cheek pieces are respectively secured throughout their length the plates 5, 6, having the usual bottom portions 7, 8, one of which overlaps the other in sliding relation,

Theendextremities of these bottom portions are bent upwardly atright angles soas to form telescoping elements 10, 9, capable of sliding one within the other.

The elements above described form a part of the construction of an ordinary loose leaf binder, and no further description of the latter is deemed necessary in the present instance.

Pivoted to the inner telescopingelement 10 is a locking dog 11 whose nose 12 extends upwardly through an opening 13 in'the upper wall of said element, and extending outwardly at right angles to thetail 14 of the dog is a lug 15, and 16 'is a spring suitably secured within said element and whose free end bears upwardly against the bottom of the'tail 14, so'that it will be readily understoodv that this spring is constantly exerting a force that will cause the nose of the dog to be impinged against the upper portion of the telescoping element 9, so as. to lock together the elements 9 and 10. I

Slidably contained within the telescoping element 10 is a lock bar 18 which has a part 19 that extends outwardly and is flanged over and above the upper portion of the telescoping element 10, this partbeing merely used for the ready manipulation of the lock bar, and the latter is confined in position by lips 21, 22, that are bent downwardly from the upper portionlO.

23 is an inclined slot out through the bar 18 the lower end of the slot terminating in a straight portion 24, and through this slot extends the lug 15, so. that it will be clear that when the lockbar is movedinwardly the lower wall of this slot 23 will swing the tail l t of the dog so that the nose 12 will be firmly impinged i against the telescoping element 9, and thus lock the telescoping sections together, and when the lock bar is moved outwardly, the upper wall of the slot 23 will force the tail. of the dog down wardly and cause the nose 12 to be withdrawn from its lockingposition, and the lug 15 will then be in the straight portion 24 of the slotrso that there can be no accidental; movement, accentuated by the spring 16, which would effect the. complete or partial locking position of the nose 12. But this straight portion 24. of the, slot 23 is merely precautionary and is not at all necessary.

It will be manifest that the action of the walls of the. slot 23 will alone be. sufficient to effect the locked and unlocked positions of the dogv 11 without the spring 16, but. this spring always tends to urge thenose of the dog into locking position, and it is possible that, in the absence of the spring, the parts would. jar. loose from, a, locking position whereas'this would not be possible with the spring present. However, the invention is clearly not limited. to the use of the spring, although, in its preferred form,

the. spring would be embodied in the con-.

struction exemplifyingthe invention herein. In some instances, particularly in the smaller sizes ofconstructions that utilize the telescoping elements 9 and 10, the lower wall of the inclined slot will not be found necessary, since the force of the spring itself is sufficient to always urge the nose of the dog into lockii'ig position, the lower wall of the slot being merely a positive means for accomplishing this purpose: and for incidentally supplementing the action of-the spring, and therefore at Figure 6 is illustrated a construction in which this lower wall of the slot is omitted and. an opening 25 formed in the loclcbar whose upper wall isinclined like the upper wall of the slot 23, and nothing but the spring itself is utilized to effect the locking position of the dog.

Referring particularlyto Figures 8, 9, and 10, the elements 10 9, telescope one within the other as in the instance of the construction shown at Figure 1, the only difference in this respect being that the upper flanged portion of the inner element extends in a direction reverse to that shown at Figure 1, so that there is a space formed between the vertical walls of these elements, and within this space are housed the lockbar 18 and the locking dog 11 which latter is pivoted directly to the inside vertical wall of the outer element 9, while the lockbar is located between the dog and the vertical wall of the element 1-0 and is operated by means of a stud 25 that extends through an elongated slot 26 in the vertical wall of the element; 9 and is secured to the lock-banany convenient knob 27 being carried by this stud, outside the slot for convenience in operating.

In this modified construction, the opera tion is precisely the same asin the construction shown at Figure 1 and the locking dog is operated by the inward movement of the lock-bar to force the nose of the dog into locking engagement with the inner telescoping element.

It will accordingly be manifest that it is immaterial which of the telescoping elements: carries; the locking dog.

In structures like loose leaf binders it is preferred touse two of these locking mechanisms, one at each end of the binder, and the efore the drawings show two of these mechanisms, both of which are similar in i all respects.

l i hat is claimed is The hereindescribed locking means for flat telescoping elements, which comprises, in combination withthese elements a lock- (log pivoted to one element, a spring which normally forces the nose ofv said dog into frictional locking contact with the other element, and a bar slidahly supported by one of the elements in parallelism with said dog and operatively engaged with the dog whereby the sliding movements of said bar will rock the dog to effect the locking and unlocking positions thereof.

In testimony whereof I affix my signature hereto.

JOHN SCHADE. 

